/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 11:03:56,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 11:03:56,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 11:03:56,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 11:03:56,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 11:03:56,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 11:03:56,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 11:03:56,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 11:03:56,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 11:03:56,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 11:03:56,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 11:03:56,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 11:03:56,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 11:03:56,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 11:03:56,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 11:03:56,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 11:03:56,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 11:03:56,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 11:03:56,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 11:03:56,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 11:03:56,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 11:03:56,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 11:03:56,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 11:03:56,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 11:03:56,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 11:03:56,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 11:03:56,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 11:03:56,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 11:03:56,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 11:03:56,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 11:03:56,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 11:03:56,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 11:03:56,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 11:03:56,238 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 11:03:56,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 11:03:56,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 11:03:56,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 11:03:56,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 11:03:56,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 11:03:56,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 11:03:56,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 11:03:56,243 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 11:03:56,266 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 11:03:56,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 11:03:56,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 11:03:56,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 11:03:56,268 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 11:03:56,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 11:03:56,269 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 11:03:56,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 11:03:56,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 11:03:56,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 11:03:56,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 11:03:56,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 11:03:56,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 11:03:56,270 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 11:03:56,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 11:03:56,270 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 11:03:56,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 11:03:56,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 11:03:56,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 11:03:56,271 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 11:03:56,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 11:03:56,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:03:56,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 11:03:56,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 11:03:56,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 11:03:56,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 11:03:56,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 11:03:56,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 11:03:56,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 11:03:56,273 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 11:03:56,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 11:03:56,628 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 11:03:56,634 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 11:03:56,635 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 11:03:56,635 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 11:03:56,636 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2020-10-13 11:03:56,692 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb6907f1f/46b045f5c15a4b7ebc535af6a82ef648/FLAGfcfcb9907 [2020-10-13 11:03:57,139 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 11:03:57,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2020-10-13 11:03:57,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb6907f1f/46b045f5c15a4b7ebc535af6a82ef648/FLAGfcfcb9907 [2020-10-13 11:03:57,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb6907f1f/46b045f5c15a4b7ebc535af6a82ef648 [2020-10-13 11:03:57,557 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 11:03:57,559 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 11:03:57,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 11:03:57,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 11:03:57,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 11:03:57,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:03:57" (1/1) ... [2020-10-13 11:03:57,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df06cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:03:57, skipping insertion in model container [2020-10-13 11:03:57,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:03:57" (1/1) ... [2020-10-13 11:03:57,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 11:03:57,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 11:03:57,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:03:57,791 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 11:03:57,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:03:57,819 INFO L208 MainTranslator]: Completed translation [2020-10-13 11:03:57,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:03:57 WrapperNode [2020-10-13 11:03:57,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 11:03:57,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 11:03:57,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 11:03:57,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 11:03:57,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:03:57" (1/1) ... [2020-10-13 11:03:57,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:03:57" (1/1) ... [2020-10-13 11:03:57,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:03:57" (1/1) ... [2020-10-13 11:03:57,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:03:57" (1/1) ... [2020-10-13 11:03:57,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:03:57" (1/1) ... [2020-10-13 11:03:57,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:03:57" (1/1) ... [2020-10-13 11:03:57,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:03:57" (1/1) ... [2020-10-13 11:03:57,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 11:03:57,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 11:03:57,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 11:03:57,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 11:03:57,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:03:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:03:58,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 11:03:58,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 11:03:58,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 11:03:58,009 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 11:03:58,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 11:03:58,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 11:03:58,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 11:03:58,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 11:03:58,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 11:03:58,204 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 11:03:58,204 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 11:03:58,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:03:58 BoogieIcfgContainer [2020-10-13 11:03:58,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 11:03:58,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 11:03:58,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 11:03:58,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 11:03:58,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:03:57" (1/3) ... [2020-10-13 11:03:58,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46630f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:03:58, skipping insertion in model container [2020-10-13 11:03:58,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:03:57" (2/3) ... [2020-10-13 11:03:58,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46630f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:03:58, skipping insertion in model container [2020-10-13 11:03:58,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:03:58" (3/3) ... [2020-10-13 11:03:58,217 INFO L109 eAbstractionObserver]: Analyzing ICFG nested3-2.c [2020-10-13 11:03:58,229 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 11:03:58,236 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 11:03:58,253 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 11:03:58,287 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 11:03:58,287 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 11:03:58,288 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 11:03:58,288 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 11:03:58,288 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 11:03:58,288 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 11:03:58,289 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 11:03:58,289 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 11:03:58,315 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-13 11:03:58,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 11:03:58,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:58,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:58,324 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:58,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:58,333 INFO L82 PathProgramCache]: Analyzing trace with hash -557519811, now seen corresponding path program 1 times [2020-10-13 11:03:58,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:58,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221938044] [2020-10-13 11:03:58,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:58,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:58,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:58,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:58,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:03:58,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:03:58,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-13 11:03:58,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:58,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:58,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:03:58,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:58,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 11:03:58,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:58,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:58,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:58,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:58,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:58,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:03:58,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:58,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:58,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:58,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:58,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:03:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:03:58,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221938044] [2020-10-13 11:03:58,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:03:58,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 11:03:58,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844373334] [2020-10-13 11:03:58,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 11:03:58,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:58,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 11:03:58,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 11:03:58,802 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-10-13 11:03:58,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:58,830 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2020-10-13 11:03:58,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 11:03:58,832 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-13 11:03:58,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:58,843 INFO L225 Difference]: With dead ends: 43 [2020-10-13 11:03:58,843 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 11:03:58,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 11:03:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 11:03:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 11:03:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 11:03:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-10-13 11:03:58,895 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 10 [2020-10-13 11:03:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:58,895 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-10-13 11:03:58,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 11:03:58,896 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-10-13 11:03:58,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 11:03:58,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:58,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:58,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 11:03:58,898 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:58,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:58,898 INFO L82 PathProgramCache]: Analyzing trace with hash -587072483, now seen corresponding path program 1 times [2020-10-13 11:03:58,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:58,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888030214] [2020-10-13 11:03:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:58,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:58,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:59,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:59,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:03:59,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:03:59,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-13 11:03:59,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:59,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:03:59,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:03:59,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:03:59,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:03:59,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:59,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:59,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:59,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:59,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:59,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:03:59,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:59,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:59,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:59,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:59,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:03:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:03:59,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888030214] [2020-10-13 11:03:59,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:03:59,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 11:03:59,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8553613] [2020-10-13 11:03:59,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 11:03:59,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:59,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 11:03:59,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:03:59,237 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 3 states. [2020-10-13 11:03:59,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:59,259 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-10-13 11:03:59,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 11:03:59,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 11:03:59,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:59,261 INFO L225 Difference]: With dead ends: 33 [2020-10-13 11:03:59,261 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 11:03:59,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:03:59,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 11:03:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2020-10-13 11:03:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 11:03:59,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-10-13 11:03:59,279 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2020-10-13 11:03:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:59,279 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-10-13 11:03:59,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 11:03:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-10-13 11:03:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-13 11:03:59,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:59,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:59,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 11:03:59,281 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:59,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:59,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1005021419, now seen corresponding path program 1 times [2020-10-13 11:03:59,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:59,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407256301] [2020-10-13 11:03:59,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:59,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:59,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:59,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:59,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 11:03:59,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:03:59,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-13 11:03:59,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:59,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:03:59,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:03:59,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:03:59,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:03:59,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:59,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:59,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:59,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:59,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:59,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:03:59,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:59,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:59,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:59,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:59,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:03:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:03:59,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407256301] [2020-10-13 11:03:59,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:03:59,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 11:03:59,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473706138] [2020-10-13 11:03:59,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 11:03:59,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:59,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 11:03:59,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:03:59,508 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2020-10-13 11:03:59,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:59,530 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-10-13 11:03:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 11:03:59,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-13 11:03:59,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:59,532 INFO L225 Difference]: With dead ends: 38 [2020-10-13 11:03:59,532 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 11:03:59,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:03:59,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 11:03:59,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-13 11:03:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 11:03:59,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-10-13 11:03:59,540 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2020-10-13 11:03:59,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:59,541 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-10-13 11:03:59,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 11:03:59,541 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-10-13 11:03:59,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 11:03:59,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:59,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:59,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 11:03:59,543 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:59,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:59,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1066437398, now seen corresponding path program 1 times [2020-10-13 11:03:59,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:59,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166583563] [2020-10-13 11:03:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:59,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:59,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:59,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:59,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:03:59,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:03:59,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-13 11:03:59,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:59,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:03:59,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:03:59,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:03:59,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:59,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:59,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:59,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:59,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:59,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:59,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:03:59,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:59,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:59,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:59,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:59,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:03:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:03:59,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166583563] [2020-10-13 11:03:59,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:03:59,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 11:03:59,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56545344] [2020-10-13 11:03:59,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 11:03:59,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:59,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 11:03:59,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:03:59,681 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2020-10-13 11:03:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:59,695 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-10-13 11:03:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 11:03:59,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-13 11:03:59,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:59,697 INFO L225 Difference]: With dead ends: 38 [2020-10-13 11:03:59,697 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 11:03:59,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:03:59,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 11:03:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-13 11:03:59,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 11:03:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-13 11:03:59,705 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2020-10-13 11:03:59,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:59,705 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-13 11:03:59,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 11:03:59,706 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-13 11:03:59,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 11:03:59,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:59,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:59,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 11:03:59,707 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:59,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:59,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1326481591, now seen corresponding path program 1 times [2020-10-13 11:03:59,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:59,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734272806] [2020-10-13 11:03:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:59,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:59,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:59,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:03:59,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:59,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-13 11:03:59,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:59,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:03:59,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:03:59,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 11:03:59,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:59,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:03:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:59,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:59,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:59,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:03:59,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:59,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:03:59,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:59,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:03:59,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:03:59,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:03:59,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:03:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:03:59,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734272806] [2020-10-13 11:03:59,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:03:59,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 11:03:59,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335642760] [2020-10-13 11:03:59,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 11:03:59,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:03:59,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 11:03:59,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:03:59,812 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2020-10-13 11:03:59,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:03:59,837 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-10-13 11:03:59,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 11:03:59,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-13 11:03:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:03:59,838 INFO L225 Difference]: With dead ends: 40 [2020-10-13 11:03:59,839 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 11:03:59,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:03:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 11:03:59,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-13 11:03:59,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 11:03:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-13 11:03:59,846 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2020-10-13 11:03:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:03:59,847 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-13 11:03:59,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 11:03:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-13 11:03:59,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 11:03:59,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:03:59,848 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:03:59,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 11:03:59,849 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:03:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:03:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1802441078, now seen corresponding path program 2 times [2020-10-13 11:03:59,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:03:59,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905372495] [2020-10-13 11:03:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:03:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:03:59,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:03:59,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:03:59,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:03:59,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:03:59,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-13 11:03:59,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:03:59,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:03:59,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:03:59,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 11:03:59,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:04:00,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:00,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:00,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:00,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:00,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:00,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:00,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:00,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:00,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:00,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:00,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:04:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:00,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905372495] [2020-10-13 11:04:00,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:00,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 11:04:00,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431268409] [2020-10-13 11:04:00,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:04:00,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:00,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:04:00,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:04:00,073 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-10-13 11:04:00,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:00,113 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-10-13 11:04:00,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:04:00,115 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-13 11:04:00,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:00,116 INFO L225 Difference]: With dead ends: 42 [2020-10-13 11:04:00,116 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 11:04:00,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:04:00,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 11:04:00,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-13 11:04:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 11:04:00,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-13 11:04:00,132 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2020-10-13 11:04:00,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:00,133 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-13 11:04:00,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:04:00,133 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-13 11:04:00,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 11:04:00,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:00,134 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:00,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 11:04:00,136 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:00,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:00,137 INFO L82 PathProgramCache]: Analyzing trace with hash -14796009, now seen corresponding path program 3 times [2020-10-13 11:04:00,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:00,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709317682] [2020-10-13 11:04:00,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:00,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:00,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:00,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:04:00,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:00,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-13 11:04:00,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:00,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:04:00,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:00,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 11:04:00,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:04:00,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:00,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:00,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:00,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:00,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:00,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:04:00,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:00,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:00,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:00,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:00,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:00,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709317682] [2020-10-13 11:04:00,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:00,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 11:04:00,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906109046] [2020-10-13 11:04:00,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:04:00,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:00,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:04:00,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:04:00,368 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2020-10-13 11:04:00,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:00,414 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-10-13 11:04:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 11:04:00,416 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-13 11:04:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:00,417 INFO L225 Difference]: With dead ends: 44 [2020-10-13 11:04:00,417 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 11:04:00,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:04:00,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 11:04:00,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-13 11:04:00,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 11:04:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-13 11:04:00,429 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2020-10-13 11:04:00,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:00,430 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-13 11:04:00,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:04:00,430 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-13 11:04:00,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 11:04:00,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:00,431 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:00,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 11:04:00,432 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:00,432 INFO L82 PathProgramCache]: Analyzing trace with hash -432373718, now seen corresponding path program 4 times [2020-10-13 11:04:00,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:00,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086213233] [2020-10-13 11:04:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:00,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:00,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:00,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:00,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:04:00,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:04:00,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-13 11:04:00,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:00,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:04:00,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:00,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 11:04:00,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:04:00,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:00,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:00,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:00,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:00,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:00,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 11:04:00,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:00,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:00,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:00,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:00,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:00,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086213233] [2020-10-13 11:04:00,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:00,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:04:00,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460023081] [2020-10-13 11:04:00,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:04:00,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:00,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:04:00,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:04:00,757 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-10-13 11:04:00,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:00,804 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-10-13 11:04:00,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:04:00,805 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-13 11:04:00,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:00,806 INFO L225 Difference]: With dead ends: 46 [2020-10-13 11:04:00,806 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 11:04:00,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:04:00,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 11:04:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-13 11:04:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 11:04:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-13 11:04:00,813 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2020-10-13 11:04:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:00,813 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-13 11:04:00,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:04:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-13 11:04:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 11:04:00,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:00,814 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:00,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 11:04:00,814 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:00,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:00,815 INFO L82 PathProgramCache]: Analyzing trace with hash -492380809, now seen corresponding path program 5 times [2020-10-13 11:04:00,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:00,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358137417] [2020-10-13 11:04:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:00,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:00,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:00,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:04:00,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:00,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-13 11:04:00,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:00,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:04:00,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:00,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 11:04:00,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:01,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:01,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:01,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:01,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:01,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:01,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:01,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:01,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:01,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:01,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:01,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:01,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358137417] [2020-10-13 11:04:01,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:01,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 11:04:01,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716136392] [2020-10-13 11:04:01,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:04:01,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:01,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:04:01,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:04:01,050 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-10-13 11:04:01,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:01,098 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-10-13 11:04:01,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:04:01,099 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-13 11:04:01,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:01,100 INFO L225 Difference]: With dead ends: 48 [2020-10-13 11:04:01,100 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 11:04:01,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:04:01,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 11:04:01,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-13 11:04:01,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 11:04:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-13 11:04:01,107 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2020-10-13 11:04:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:01,108 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-13 11:04:01,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:04:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-13 11:04:01,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 11:04:01,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:01,109 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:01,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 11:04:01,109 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:01,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:01,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1942366666, now seen corresponding path program 6 times [2020-10-13 11:04:01,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:01,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879820053] [2020-10-13 11:04:01,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:01,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:01,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:01,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 11:04:01,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:01,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-13 11:04:01,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:01,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:04:01,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:01,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:04:01,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:01,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:01,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:01,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:01,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:01,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:01,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:04:01,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:01,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:01,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:01,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:01,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:01,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879820053] [2020-10-13 11:04:01,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:01,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:04:01,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338764397] [2020-10-13 11:04:01,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:04:01,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:01,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:04:01,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:04:01,386 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 9 states. [2020-10-13 11:04:01,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:01,491 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-10-13 11:04:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:04:01,494 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-13 11:04:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:01,495 INFO L225 Difference]: With dead ends: 50 [2020-10-13 11:04:01,495 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 11:04:01,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:04:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 11:04:01,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-13 11:04:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 11:04:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-13 11:04:01,505 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2020-10-13 11:04:01,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:01,506 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-13 11:04:01,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:04:01,509 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-13 11:04:01,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 11:04:01,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:01,510 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:01,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 11:04:01,510 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:01,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:01,511 INFO L82 PathProgramCache]: Analyzing trace with hash 110127063, now seen corresponding path program 7 times [2020-10-13 11:04:01,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:01,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053923826] [2020-10-13 11:04:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:01,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:01,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:01,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:04:01,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:01,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-13 11:04:01,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:01,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:04:01,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:01,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:04:01,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:01,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:01,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:01,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:01,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:01,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:01,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:01,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:01,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:01,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:01,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:01,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:01,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053923826] [2020-10-13 11:04:01,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:01,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:04:01,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546323132] [2020-10-13 11:04:01,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:04:01,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:01,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:04:01,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:04:01,904 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 10 states. [2020-10-13 11:04:01,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:01,983 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-10-13 11:04:01,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:04:01,984 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-13 11:04:01,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:01,985 INFO L225 Difference]: With dead ends: 52 [2020-10-13 11:04:01,985 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 11:04:01,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:04:01,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 11:04:01,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-13 11:04:01,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 11:04:01,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-13 11:04:01,996 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2020-10-13 11:04:01,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:01,998 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-13 11:04:01,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:04:01,998 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-13 11:04:01,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 11:04:01,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:01,999 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:01,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 11:04:01,999 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:02,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:02,000 INFO L82 PathProgramCache]: Analyzing trace with hash -854725782, now seen corresponding path program 8 times [2020-10-13 11:04:02,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:02,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190574040] [2020-10-13 11:04:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:02,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:02,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:02,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:02,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:04:02,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:04:02,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-13 11:04:02,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:02,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:04:02,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:02,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 11:04:02,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:02,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:02,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:02,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:02,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:02,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:02,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:02,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:02,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:02,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:02,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:02,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:02,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190574040] [2020-10-13 11:04:02,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:02,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:04:02,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867463554] [2020-10-13 11:04:02,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:04:02,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:02,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:04:02,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:04:02,533 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 11 states. [2020-10-13 11:04:02,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:02,619 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-10-13 11:04:02,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 11:04:02,620 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-13 11:04:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:02,620 INFO L225 Difference]: With dead ends: 54 [2020-10-13 11:04:02,621 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 11:04:02,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:04:02,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 11:04:02,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-13 11:04:02,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 11:04:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-13 11:04:02,627 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-10-13 11:04:02,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:02,627 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-13 11:04:02,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:04:02,627 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-13 11:04:02,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 11:04:02,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:02,628 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:02,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 11:04:02,628 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:02,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:02,629 INFO L82 PathProgramCache]: Analyzing trace with hash -700392905, now seen corresponding path program 9 times [2020-10-13 11:04:02,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:02,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194652550] [2020-10-13 11:04:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:02,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:02,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:02,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 11:04:02,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:02,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-13 11:04:02,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:02,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:04:02,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:02,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 11:04:02,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:03,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:03,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:03,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:03,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:03,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:03,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:03,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:03,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:03,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:03,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:03,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:04:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:03,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194652550] [2020-10-13 11:04:03,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:03,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 11:04:03,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734442981] [2020-10-13 11:04:03,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 11:04:03,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:03,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 11:04:03,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:04:03,059 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 12 states. [2020-10-13 11:04:03,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:03,166 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-13 11:04:03,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 11:04:03,167 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-13 11:04:03,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:03,168 INFO L225 Difference]: With dead ends: 56 [2020-10-13 11:04:03,168 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 11:04:03,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:04:03,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 11:04:03,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-13 11:04:03,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 11:04:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-13 11:04:03,174 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2020-10-13 11:04:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:03,174 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-13 11:04:03,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 11:04:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-13 11:04:03,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 11:04:03,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:03,175 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:03,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 11:04:03,176 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:03,176 INFO L82 PathProgramCache]: Analyzing trace with hash -211041014, now seen corresponding path program 10 times [2020-10-13 11:04:03,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:03,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708611336] [2020-10-13 11:04:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:03,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:03,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:03,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 11:04:03,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:03,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-13 11:04:03,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:03,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:04:03,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:03,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 11:04:03,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:04:03,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:03,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:03,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:03,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:03,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:03,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:03,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:03,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:03,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:03,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:03,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:03,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708611336] [2020-10-13 11:04:03,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:03,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:04:03,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309378384] [2020-10-13 11:04:03,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:04:03,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:03,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:04:03,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:04:03,671 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 13 states. [2020-10-13 11:04:03,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:03,783 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-10-13 11:04:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 11:04:03,783 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-13 11:04:03,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:03,784 INFO L225 Difference]: With dead ends: 58 [2020-10-13 11:04:03,784 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 11:04:03,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:04:03,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 11:04:03,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-13 11:04:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 11:04:03,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-13 11:04:03,791 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-13 11:04:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:03,791 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-13 11:04:03,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:04:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-13 11:04:03,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 11:04:03,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:03,792 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:03,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 11:04:03,793 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:03,793 INFO L82 PathProgramCache]: Analyzing trace with hash 2073965719, now seen corresponding path program 11 times [2020-10-13 11:04:03,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:03,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455183559] [2020-10-13 11:04:03,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:03,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:04,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:04,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 11:04:04,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:04,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-13 11:04:04,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:04,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:04:04,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:04,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 11:04:04,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:04,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:04,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:04,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:04,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:04,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:04,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:04,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:04,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:04,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:04,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:04,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:04,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455183559] [2020-10-13 11:04:04,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:04,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 11:04:04,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879357103] [2020-10-13 11:04:04,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 11:04:04,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:04,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 11:04:04,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:04:04,368 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 14 states. [2020-10-13 11:04:04,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:04,498 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-13 11:04:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 11:04:04,498 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-13 11:04:04,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:04,499 INFO L225 Difference]: With dead ends: 60 [2020-10-13 11:04:04,499 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 11:04:04,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:04:04,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 11:04:04,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-13 11:04:04,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 11:04:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-13 11:04:04,506 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 23 [2020-10-13 11:04:04,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:04,506 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-13 11:04:04,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 11:04:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-13 11:04:04,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 11:04:04,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:04,508 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:04,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 11:04:04,508 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:04,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:04,509 INFO L82 PathProgramCache]: Analyzing trace with hash -105269590, now seen corresponding path program 12 times [2020-10-13 11:04:04,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:04,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302264595] [2020-10-13 11:04:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:04,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:04,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:05,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:05,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 11:04:05,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:04:05,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-10-13 11:04:05,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:05,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:04:05,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:05,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:04:05,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:05,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:05,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:05,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:05,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:05,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:05,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:05,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:05,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:05,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:05,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:05,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:04:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:05,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302264595] [2020-10-13 11:04:05,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:05,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 11:04:05,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754684650] [2020-10-13 11:04:05,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 11:04:05,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:05,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 11:04:05,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:04:05,511 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 15 states. [2020-10-13 11:04:05,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:05,720 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-10-13 11:04:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 11:04:05,721 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-13 11:04:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:05,721 INFO L225 Difference]: With dead ends: 62 [2020-10-13 11:04:05,722 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 11:04:05,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:04:05,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 11:04:05,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-13 11:04:05,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 11:04:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-13 11:04:05,728 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 24 [2020-10-13 11:04:05,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:05,728 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-13 11:04:05,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 11:04:05,728 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-13 11:04:05,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 11:04:05,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:05,729 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:05,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 11:04:05,730 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:05,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:05,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1057912567, now seen corresponding path program 13 times [2020-10-13 11:04:05,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:05,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272323248] [2020-10-13 11:04:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:05,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:06,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:06,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 11:04:06,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:06,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-13 11:04:06,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:06,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:04:06,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:06,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:04:06,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:06,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:06,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:06,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:06,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:06,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:06,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:06,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:06,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:06,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:06,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:06,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:04:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:06,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272323248] [2020-10-13 11:04:06,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:06,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 11:04:06,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344722663] [2020-10-13 11:04:06,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 11:04:06,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:06,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 11:04:06,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:04:06,458 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 16 states. [2020-10-13 11:04:06,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:06,648 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-13 11:04:06,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 11:04:06,649 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-13 11:04:06,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:06,650 INFO L225 Difference]: With dead ends: 64 [2020-10-13 11:04:06,650 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 11:04:06,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:04:06,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 11:04:06,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-13 11:04:06,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 11:04:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-13 11:04:06,656 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 25 [2020-10-13 11:04:06,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:06,656 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-13 11:04:06,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 11:04:06,657 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-13 11:04:06,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 11:04:06,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:06,657 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:06,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 11:04:06,658 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:06,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:06,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1538146230, now seen corresponding path program 14 times [2020-10-13 11:04:06,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:06,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322660869] [2020-10-13 11:04:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:06,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:07,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:07,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 11:04:07,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:07,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-13 11:04:07,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:07,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:04:07,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:07,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:04:07,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:07,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:07,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:07,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:07,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:07,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:07,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:07,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:07,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:07,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:07,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:07,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:07,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322660869] [2020-10-13 11:04:07,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:07,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 11:04:07,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860234302] [2020-10-13 11:04:07,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 11:04:07,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:07,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 11:04:07,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:04:07,385 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 17 states. [2020-10-13 11:04:07,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:07,588 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-10-13 11:04:07,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 11:04:07,589 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-13 11:04:07,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:07,590 INFO L225 Difference]: With dead ends: 66 [2020-10-13 11:04:07,590 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 11:04:07,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:04:07,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 11:04:07,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-13 11:04:07,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 11:04:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-13 11:04:07,596 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 26 [2020-10-13 11:04:07,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:07,596 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-13 11:04:07,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 11:04:07,596 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-13 11:04:07,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 11:04:07,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:07,597 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:07,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 11:04:07,597 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:07,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:07,598 INFO L82 PathProgramCache]: Analyzing trace with hash -411590313, now seen corresponding path program 15 times [2020-10-13 11:04:07,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:07,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952003405] [2020-10-13 11:04:07,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:07,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:08,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:08,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 11:04:08,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:08,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 477 [2020-10-13 11:04:08,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:08,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:04:08,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:08,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:04:08,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:08,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:08,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:08,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:08,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:08,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:08,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:08,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:08,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:08,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:08,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:08,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:08,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952003405] [2020-10-13 11:04:08,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:08,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 11:04:08,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895119936] [2020-10-13 11:04:08,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 11:04:08,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:08,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 11:04:08,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:04:08,381 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 18 states. [2020-10-13 11:04:08,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:08,587 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-10-13 11:04:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 11:04:08,587 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-13 11:04:08,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:08,588 INFO L225 Difference]: With dead ends: 68 [2020-10-13 11:04:08,588 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 11:04:08,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:04:08,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 11:04:08,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-13 11:04:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 11:04:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-13 11:04:08,594 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2020-10-13 11:04:08,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:08,595 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-13 11:04:08,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 11:04:08,595 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-13 11:04:08,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 11:04:08,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:08,596 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:08,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 11:04:08,596 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:08,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:08,596 INFO L82 PathProgramCache]: Analyzing trace with hash 151904746, now seen corresponding path program 16 times [2020-10-13 11:04:08,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:08,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37145550] [2020-10-13 11:04:08,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:08,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:09,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:09,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:09,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 11:04:09,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:04:09,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 905 [2020-10-13 11:04:09,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:09,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 11:04:09,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:09,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:04:09,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:09,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:09,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:09,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:09,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:09,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:09,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:09,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:09,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:09,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37145550] [2020-10-13 11:04:09,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:09,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 11:04:09,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186392761] [2020-10-13 11:04:09,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 11:04:09,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:09,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 11:04:09,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:04:09,816 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 19 states. [2020-10-13 11:04:10,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:10,017 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-10-13 11:04:10,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 11:04:10,018 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-13 11:04:10,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:10,019 INFO L225 Difference]: With dead ends: 70 [2020-10-13 11:04:10,019 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 11:04:10,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:04:10,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 11:04:10,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-13 11:04:10,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 11:04:10,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-13 11:04:10,024 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2020-10-13 11:04:10,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:10,025 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-13 11:04:10,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 11:04:10,025 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-13 11:04:10,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 11:04:10,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:10,026 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:10,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 11:04:10,026 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:10,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:10,026 INFO L82 PathProgramCache]: Analyzing trace with hash 440382391, now seen corresponding path program 17 times [2020-10-13 11:04:10,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:10,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62797584] [2020-10-13 11:04:10,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:10,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:10,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:10,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 11:04:10,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:10,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-10-13 11:04:10,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:10,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 11:04:10,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:10,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:04:10,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:10,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:11,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:11,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:11,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:11,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:11,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:11,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:11,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:11,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:11,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:11,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:11,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62797584] [2020-10-13 11:04:11,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:11,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 11:04:11,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13495926] [2020-10-13 11:04:11,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 11:04:11,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:11,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 11:04:11,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:04:11,008 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 20 states. [2020-10-13 11:04:11,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:11,230 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-10-13 11:04:11,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 11:04:11,231 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-13 11:04:11,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:11,231 INFO L225 Difference]: With dead ends: 72 [2020-10-13 11:04:11,231 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 11:04:11,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:04:11,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 11:04:11,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 11:04:11,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 11:04:11,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-13 11:04:11,237 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 29 [2020-10-13 11:04:11,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:11,237 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-13 11:04:11,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 11:04:11,238 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-13 11:04:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 11:04:11,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:11,238 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:11,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 11:04:11,239 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:11,239 INFO L82 PathProgramCache]: Analyzing trace with hash 793254794, now seen corresponding path program 18 times [2020-10-13 11:04:11,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:11,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953857721] [2020-10-13 11:04:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:11,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:12,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:12,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 11:04:12,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:12,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 791 [2020-10-13 11:04:12,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:12,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 11:04:12,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:12,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:04:12,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:12,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:12,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:12,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:12,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:12,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:12,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:12,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:12,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:12,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:12,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:12,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:12,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953857721] [2020-10-13 11:04:12,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:12,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 11:04:12,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992422700] [2020-10-13 11:04:12,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 11:04:12,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:12,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 11:04:12,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:04:12,439 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 21 states. [2020-10-13 11:04:12,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:12,678 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-10-13 11:04:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 11:04:12,681 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-13 11:04:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:12,682 INFO L225 Difference]: With dead ends: 74 [2020-10-13 11:04:12,682 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 11:04:12,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:04:12,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 11:04:12,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-13 11:04:12,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 11:04:12,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-13 11:04:12,694 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 30 [2020-10-13 11:04:12,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:12,695 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-13 11:04:12,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 11:04:12,695 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-13 11:04:12,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 11:04:12,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:12,696 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:12,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 11:04:12,696 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:12,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:12,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1152602601, now seen corresponding path program 19 times [2020-10-13 11:04:12,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:12,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486172344] [2020-10-13 11:04:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:12,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:13,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:13,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 11:04:13,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:13,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 659 [2020-10-13 11:04:13,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:13,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 11:04:13,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:13,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:04:13,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:04:13,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:13,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:13,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:13,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:13,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:13,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:04:13,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:13,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:13,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:13,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:13,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:13,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486172344] [2020-10-13 11:04:13,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:13,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 11:04:13,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976160571] [2020-10-13 11:04:13,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 11:04:13,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:13,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 11:04:13,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:04:13,762 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 22 states. [2020-10-13 11:04:14,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:14,031 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2020-10-13 11:04:14,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 11:04:14,032 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-13 11:04:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:14,033 INFO L225 Difference]: With dead ends: 76 [2020-10-13 11:04:14,033 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 11:04:14,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:04:14,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 11:04:14,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-13 11:04:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 11:04:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-13 11:04:14,039 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 31 [2020-10-13 11:04:14,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:14,039 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-13 11:04:14,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 11:04:14,039 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-13 11:04:14,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 11:04:14,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:14,042 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:14,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 11:04:14,042 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:14,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1344639702, now seen corresponding path program 20 times [2020-10-13 11:04:14,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:14,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106519044] [2020-10-13 11:04:14,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:14,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:14,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:15,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:15,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 11:04:15,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:04:15,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1102 [2020-10-13 11:04:15,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:15,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 11:04:15,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:15,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 11:04:15,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:15,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:15,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:15,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:15,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:15,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:15,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:15,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:15,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:15,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:15,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:15,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:15,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106519044] [2020-10-13 11:04:15,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:15,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 11:04:15,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322250184] [2020-10-13 11:04:15,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 11:04:15,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:15,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 11:04:15,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-13 11:04:15,565 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 23 states. [2020-10-13 11:04:15,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:15,871 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2020-10-13 11:04:15,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 11:04:15,872 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2020-10-13 11:04:15,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:15,873 INFO L225 Difference]: With dead ends: 78 [2020-10-13 11:04:15,873 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 11:04:15,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-13 11:04:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 11:04:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-13 11:04:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 11:04:15,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-13 11:04:15,879 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 32 [2020-10-13 11:04:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:15,879 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-13 11:04:15,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 11:04:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-13 11:04:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 11:04:15,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:15,880 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:15,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 11:04:15,880 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:15,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:15,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1292144759, now seen corresponding path program 21 times [2020-10-13 11:04:15,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:15,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293042116] [2020-10-13 11:04:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:15,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:16,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:16,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 11:04:16,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:16,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 703 [2020-10-13 11:04:16,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:16,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 11:04:16,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:16,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:04:16,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:04:17,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:17,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:17,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:17,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:17,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:17,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:17,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:17,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:17,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293042116] [2020-10-13 11:04:17,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:17,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 11:04:17,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626546753] [2020-10-13 11:04:17,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 11:04:17,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:17,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 11:04:17,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:04:17,062 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 24 states. [2020-10-13 11:04:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:17,372 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2020-10-13 11:04:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 11:04:17,373 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2020-10-13 11:04:17,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:17,373 INFO L225 Difference]: With dead ends: 80 [2020-10-13 11:04:17,374 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 11:04:17,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:04:17,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 11:04:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-13 11:04:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 11:04:17,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-13 11:04:17,379 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 33 [2020-10-13 11:04:17,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:17,379 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-13 11:04:17,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 11:04:17,380 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-13 11:04:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 11:04:17,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:17,380 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:17,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 11:04:17,380 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:17,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:17,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1428084426, now seen corresponding path program 22 times [2020-10-13 11:04:17,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:17,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028366049] [2020-10-13 11:04:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:17,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:18,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:18,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 11:04:18,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:18,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1121 [2020-10-13 11:04:18,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:18,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 11:04:18,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:18,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:04:18,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:18,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:18,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:18,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:18,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:18,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:18,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:18,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:18,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:18,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:18,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:18,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:18,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028366049] [2020-10-13 11:04:18,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:18,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 11:04:18,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314738974] [2020-10-13 11:04:18,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 11:04:18,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:18,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 11:04:18,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-13 11:04:18,982 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 25 states. [2020-10-13 11:04:19,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:19,328 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-10-13 11:04:19,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 11:04:19,331 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 34 [2020-10-13 11:04:19,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:19,332 INFO L225 Difference]: With dead ends: 82 [2020-10-13 11:04:19,332 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 11:04:19,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-13 11:04:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 11:04:19,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-13 11:04:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 11:04:19,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-13 11:04:19,340 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 34 [2020-10-13 11:04:19,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:19,340 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-13 11:04:19,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 11:04:19,340 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-13 11:04:19,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 11:04:19,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:19,341 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:19,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 11:04:19,341 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:19,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1347246807, now seen corresponding path program 23 times [2020-10-13 11:04:19,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:19,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968658514] [2020-10-13 11:04:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:19,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:20,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:20,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 11:04:20,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:20,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 924 [2020-10-13 11:04:20,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:20,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 11:04:20,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:20,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:04:20,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:20,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:20,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:20,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:20,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:20,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:20,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:04:20,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:20,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:20,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:20,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:20,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:20,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968658514] [2020-10-13 11:04:20,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:20,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 11:04:20,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471518164] [2020-10-13 11:04:20,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 11:04:20,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:20,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 11:04:20,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:04:20,764 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 26 states. [2020-10-13 11:04:21,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:21,187 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-10-13 11:04:21,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 11:04:21,187 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 35 [2020-10-13 11:04:21,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:21,188 INFO L225 Difference]: With dead ends: 84 [2020-10-13 11:04:21,188 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 11:04:21,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:04:21,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 11:04:21,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-13 11:04:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 11:04:21,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-13 11:04:21,195 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 35 [2020-10-13 11:04:21,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:21,195 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-13 11:04:21,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 11:04:21,196 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-13 11:04:21,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 11:04:21,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:21,196 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:21,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 11:04:21,197 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:21,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:21,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1158719382, now seen corresponding path program 24 times [2020-10-13 11:04:21,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:21,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544907157] [2020-10-13 11:04:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:21,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:22,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:22,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:22,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 11:04:22,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:04:22,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1716 [2020-10-13 11:04:22,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:22,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 11:04:22,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:22,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 11:04:22,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:04:23,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:23,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:23,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:23,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:23,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:23,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:23,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:23,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:23,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:23,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:23,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:23,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544907157] [2020-10-13 11:04:23,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:23,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 11:04:23,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101675614] [2020-10-13 11:04:23,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 11:04:23,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:23,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 11:04:23,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-13 11:04:23,488 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 27 states. [2020-10-13 11:04:23,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:23,948 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-10-13 11:04:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 11:04:23,951 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 36 [2020-10-13 11:04:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:23,952 INFO L225 Difference]: With dead ends: 86 [2020-10-13 11:04:23,952 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 11:04:23,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-13 11:04:23,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 11:04:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-13 11:04:23,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 11:04:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-13 11:04:23,958 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 36 [2020-10-13 11:04:23,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:23,959 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-13 11:04:23,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 11:04:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-13 11:04:23,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 11:04:23,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:23,959 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:23,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 11:04:23,960 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:23,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:23,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1534259913, now seen corresponding path program 25 times [2020-10-13 11:04:23,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:23,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471592644] [2020-10-13 11:04:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:23,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:25,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:25,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 11:04:25,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:25,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1410 [2020-10-13 11:04:25,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:25,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 11:04:25,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:25,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 11:04:25,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:04:25,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:25,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:25,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:25,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:25,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:25,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:25,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:25,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:25,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:25,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:25,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:25,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471592644] [2020-10-13 11:04:25,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:25,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 11:04:25,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908946912] [2020-10-13 11:04:26,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 11:04:26,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:26,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 11:04:26,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:04:26,002 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 28 states. [2020-10-13 11:04:26,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:26,492 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2020-10-13 11:04:26,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 11:04:26,495 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 37 [2020-10-13 11:04:26,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:26,496 INFO L225 Difference]: With dead ends: 88 [2020-10-13 11:04:26,497 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 11:04:26,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:04:26,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 11:04:26,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-13 11:04:26,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 11:04:26,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-13 11:04:26,506 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 37 [2020-10-13 11:04:26,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:26,506 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-13 11:04:26,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 11:04:26,507 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-13 11:04:26,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 11:04:26,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:26,507 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:26,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 11:04:26,508 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:26,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:26,508 INFO L82 PathProgramCache]: Analyzing trace with hash -291114486, now seen corresponding path program 26 times [2020-10-13 11:04:26,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:26,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078280612] [2020-10-13 11:04:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:26,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:27,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:27,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 11:04:27,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:27,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1130 [2020-10-13 11:04:27,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:27,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 11:04:27,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:27,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 11:04:27,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:28,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:28,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:28,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:28,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:28,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:28,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:28,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:28,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:28,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:28,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:28,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:04:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:28,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078280612] [2020-10-13 11:04:28,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:28,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 11:04:28,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650853072] [2020-10-13 11:04:28,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 11:04:28,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:28,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 11:04:28,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-13 11:04:28,276 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 29 states. [2020-10-13 11:04:28,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:28,787 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-10-13 11:04:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 11:04:28,790 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2020-10-13 11:04:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:28,791 INFO L225 Difference]: With dead ends: 90 [2020-10-13 11:04:28,792 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 11:04:28,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-13 11:04:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 11:04:28,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-13 11:04:28,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 11:04:28,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-13 11:04:28,800 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 38 [2020-10-13 11:04:28,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:28,800 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-13 11:04:28,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 11:04:28,801 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-13 11:04:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 11:04:28,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:28,801 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:28,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 11:04:28,804 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:28,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:28,805 INFO L82 PathProgramCache]: Analyzing trace with hash -408311913, now seen corresponding path program 27 times [2020-10-13 11:04:28,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:28,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723770606] [2020-10-13 11:04:28,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:28,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:29,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:29,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 11:04:29,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:29,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-10-13 11:04:29,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:29,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 11:04:29,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:29,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 11:04:29,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:30,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:30,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:30,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:30,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:30,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:30,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:04:30,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:30,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:30,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:30,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:30,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:30,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723770606] [2020-10-13 11:04:30,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:30,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 11:04:30,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720570167] [2020-10-13 11:04:30,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 11:04:30,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:30,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 11:04:30,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:04:30,410 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 30 states. [2020-10-13 11:04:30,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:30,939 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2020-10-13 11:04:30,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 11:04:30,939 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 39 [2020-10-13 11:04:30,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:30,940 INFO L225 Difference]: With dead ends: 92 [2020-10-13 11:04:30,940 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 11:04:30,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-13 11:04:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 11:04:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-13 11:04:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 11:04:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-13 11:04:30,946 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 39 [2020-10-13 11:04:30,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:30,946 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-13 11:04:30,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 11:04:30,947 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-13 11:04:30,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 11:04:30,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:30,947 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:30,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 11:04:30,948 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:30,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:30,948 INFO L82 PathProgramCache]: Analyzing trace with hash 253535146, now seen corresponding path program 28 times [2020-10-13 11:04:30,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:30,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770111408] [2020-10-13 11:04:30,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:30,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:31,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:32,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:32,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 11:04:32,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:04:32,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1360 [2020-10-13 11:04:32,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:32,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 11:04:32,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:32,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 11:04:32,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:33,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:33,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:33,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:33,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:33,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:33,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:33,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:33,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:33,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:33,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:33,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:33,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770111408] [2020-10-13 11:04:33,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:33,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 11:04:33,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491006041] [2020-10-13 11:04:33,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 11:04:33,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:33,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 11:04:33,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-13 11:04:33,021 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 31 states. [2020-10-13 11:04:33,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:33,557 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2020-10-13 11:04:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 11:04:33,558 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 40 [2020-10-13 11:04:33,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:33,558 INFO L225 Difference]: With dead ends: 94 [2020-10-13 11:04:33,559 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 11:04:33,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-13 11:04:33,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 11:04:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-13 11:04:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 11:04:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-13 11:04:33,565 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 40 [2020-10-13 11:04:33,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:33,565 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-13 11:04:33,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 11:04:33,565 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-13 11:04:33,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 11:04:33,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:33,566 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:33,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 11:04:33,566 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:33,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:33,566 INFO L82 PathProgramCache]: Analyzing trace with hash -704042505, now seen corresponding path program 29 times [2020-10-13 11:04:33,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:33,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260958231] [2020-10-13 11:04:33,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:33,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:34,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:34,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 11:04:34,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:34,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 868 [2020-10-13 11:04:34,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:34,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 11:04:34,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:34,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 11:04:34,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:35,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:35,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:35,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:35,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:35,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:35,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:04:35,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:35,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:35,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:35,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:35,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:35,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260958231] [2020-10-13 11:04:35,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:35,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 11:04:35,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736373803] [2020-10-13 11:04:35,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 11:04:35,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:35,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 11:04:35,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:04:35,167 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 32 states. [2020-10-13 11:04:35,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:35,784 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2020-10-13 11:04:35,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 11:04:35,785 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 41 [2020-10-13 11:04:35,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:35,786 INFO L225 Difference]: With dead ends: 96 [2020-10-13 11:04:35,786 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 11:04:35,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:04:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 11:04:35,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-13 11:04:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 11:04:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-13 11:04:35,793 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 41 [2020-10-13 11:04:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:35,793 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-13 11:04:35,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 11:04:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-13 11:04:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 11:04:35,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:35,794 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:35,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 11:04:35,794 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:35,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:35,794 INFO L82 PathProgramCache]: Analyzing trace with hash -324178614, now seen corresponding path program 30 times [2020-10-13 11:04:35,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:35,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427670841] [2020-10-13 11:04:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:35,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:36,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:36,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 11:04:36,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:36,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 847 [2020-10-13 11:04:36,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:36,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 11:04:36,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:36,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 11:04:36,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:37,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:37,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:37,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:37,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:37,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:37,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:04:37,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:37,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:37,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:37,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:37,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:37,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427670841] [2020-10-13 11:04:37,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:37,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 11:04:37,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566002397] [2020-10-13 11:04:37,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 11:04:37,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:37,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 11:04:37,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 11:04:37,400 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 33 states. [2020-10-13 11:04:38,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:38,054 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2020-10-13 11:04:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 11:04:38,054 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 42 [2020-10-13 11:04:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:38,055 INFO L225 Difference]: With dead ends: 98 [2020-10-13 11:04:38,055 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 11:04:38,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 11:04:38,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 11:04:38,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-13 11:04:38,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 11:04:38,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-13 11:04:38,061 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 42 [2020-10-13 11:04:38,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:38,061 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-13 11:04:38,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 11:04:38,061 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-13 11:04:38,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 11:04:38,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:38,062 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:38,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 11:04:38,062 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:38,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1433299881, now seen corresponding path program 31 times [2020-10-13 11:04:38,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:38,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017158293] [2020-10-13 11:04:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:38,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:39,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:39,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 11:04:39,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:39,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-10-13 11:04:39,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:39,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 11:04:39,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:39,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 11:04:39,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:39,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:39,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:39,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:39,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:39,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:39,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:04:39,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:39,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:39,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:39,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:39,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:39,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017158293] [2020-10-13 11:04:39,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:39,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 11:04:39,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074131949] [2020-10-13 11:04:39,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 11:04:39,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:39,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 11:04:39,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:04:39,916 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 34 states. [2020-10-13 11:04:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:40,610 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2020-10-13 11:04:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 11:04:40,611 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 43 [2020-10-13 11:04:40,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:40,611 INFO L225 Difference]: With dead ends: 100 [2020-10-13 11:04:40,612 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 11:04:40,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 11:04:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 11:04:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-13 11:04:40,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 11:04:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-13 11:04:40,627 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 43 [2020-10-13 11:04:40,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:40,627 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-13 11:04:40,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 11:04:40,627 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-13 11:04:40,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 11:04:40,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:40,629 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:40,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 11:04:40,629 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:40,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:40,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1456320790, now seen corresponding path program 32 times [2020-10-13 11:04:40,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:40,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598982831] [2020-10-13 11:04:40,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:40,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:41,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:41,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:41,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 11:04:41,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:04:41,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1336 [2020-10-13 11:04:41,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:41,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 11:04:41,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:41,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 11:04:41,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:42,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:42,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:42,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:42,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:42,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:42,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:42,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:42,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:42,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:42,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:42,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:42,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598982831] [2020-10-13 11:04:42,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:42,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 11:04:42,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25684930] [2020-10-13 11:04:42,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 11:04:42,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:42,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 11:04:42,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 11:04:42,813 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 35 states. [2020-10-13 11:04:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:43,531 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2020-10-13 11:04:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 11:04:43,532 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 44 [2020-10-13 11:04:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:43,532 INFO L225 Difference]: With dead ends: 102 [2020-10-13 11:04:43,533 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 11:04:43,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 11:04:43,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 11:04:43,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-13 11:04:43,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 11:04:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-13 11:04:43,537 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 44 [2020-10-13 11:04:43,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:43,538 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-13 11:04:43,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 11:04:43,538 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-13 11:04:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 11:04:43,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:43,539 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:43,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 11:04:43,539 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:43,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:43,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2124998327, now seen corresponding path program 33 times [2020-10-13 11:04:43,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:43,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253454411] [2020-10-13 11:04:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:43,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:44,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:44,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 11:04:44,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:44,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 908 [2020-10-13 11:04:44,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:44,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 11:04:44,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:44,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 11:04:44,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:45,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:45,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:45,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:45,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:45,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:45,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:45,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:45,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:45,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:45,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:45,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:45,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253454411] [2020-10-13 11:04:45,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:45,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 11:04:45,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674808777] [2020-10-13 11:04:45,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 11:04:45,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:45,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 11:04:45,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:04:45,362 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 36 states. [2020-10-13 11:04:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:46,131 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2020-10-13 11:04:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 11:04:46,132 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 45 [2020-10-13 11:04:46,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:46,132 INFO L225 Difference]: With dead ends: 104 [2020-10-13 11:04:46,133 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 11:04:46,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 11:04:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 11:04:46,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-13 11:04:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 11:04:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-13 11:04:46,140 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 45 [2020-10-13 11:04:46,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:46,140 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-13 11:04:46,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 11:04:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-13 11:04:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 11:04:46,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:46,141 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:46,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 11:04:46,142 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:46,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:46,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1476741258, now seen corresponding path program 34 times [2020-10-13 11:04:46,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:46,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107052688] [2020-10-13 11:04:46,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:46,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:47,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:47,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 11:04:47,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:47,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1139 [2020-10-13 11:04:47,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:47,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 11:04:47,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:47,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 11:04:47,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:48,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:48,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:48,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:48,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:48,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:48,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:48,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:48,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:48,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:48,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:48,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:48,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107052688] [2020-10-13 11:04:48,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:48,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 11:04:48,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996894278] [2020-10-13 11:04:48,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 11:04:48,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:48,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 11:04:48,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 11:04:48,223 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 37 states. [2020-10-13 11:04:49,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:49,033 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2020-10-13 11:04:49,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 11:04:49,035 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 46 [2020-10-13 11:04:49,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:49,036 INFO L225 Difference]: With dead ends: 106 [2020-10-13 11:04:49,036 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 11:04:49,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 11:04:49,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 11:04:49,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 11:04:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 11:04:49,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-13 11:04:49,043 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 46 [2020-10-13 11:04:49,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:49,043 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-13 11:04:49,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 11:04:49,043 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-13 11:04:49,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 11:04:49,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:49,046 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:49,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 11:04:49,046 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1439358697, now seen corresponding path program 35 times [2020-10-13 11:04:49,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:49,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324821007] [2020-10-13 11:04:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:49,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:49,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:49,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 11:04:49,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:49,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 884 [2020-10-13 11:04:49,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:49,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 11:04:49,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:49,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 11:04:49,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:50,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:50,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:50,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:50,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:50,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:50,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:04:50,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:50,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:50,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:50,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:50,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:50,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324821007] [2020-10-13 11:04:50,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:50,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 11:04:50,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613712174] [2020-10-13 11:04:50,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 11:04:50,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:50,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 11:04:50,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 11:04:50,965 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 38 states. [2020-10-13 11:04:51,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:51,803 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2020-10-13 11:04:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 11:04:51,807 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 47 [2020-10-13 11:04:51,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:51,808 INFO L225 Difference]: With dead ends: 108 [2020-10-13 11:04:51,808 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 11:04:51,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 11:04:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 11:04:51,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-13 11:04:51,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 11:04:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-13 11:04:51,823 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 47 [2020-10-13 11:04:51,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:51,824 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-13 11:04:51,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 11:04:51,824 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-13 11:04:51,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 11:04:51,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:51,824 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:51,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 11:04:51,825 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:51,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:51,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1644144086, now seen corresponding path program 36 times [2020-10-13 11:04:51,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:51,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542296984] [2020-10-13 11:04:51,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:51,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:53,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:54,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:54,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 11:04:54,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:04:54,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2293 [2020-10-13 11:04:54,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:54,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 11:04:54,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:54,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 11:04:54,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:55,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:55,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:55,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:55,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:55,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:55,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:04:55,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:55,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:55,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:55,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:55,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:55,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542296984] [2020-10-13 11:04:55,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:55,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 11:04:55,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209520730] [2020-10-13 11:04:55,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 11:04:55,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:55,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 11:04:55,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 11:04:55,163 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 39 states. [2020-10-13 11:04:56,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:56,074 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2020-10-13 11:04:56,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 11:04:56,074 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 48 [2020-10-13 11:04:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:56,075 INFO L225 Difference]: With dead ends: 110 [2020-10-13 11:04:56,075 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 11:04:56,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 11:04:56,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 11:04:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-13 11:04:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 11:04:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-13 11:04:56,081 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 48 [2020-10-13 11:04:56,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:56,082 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-13 11:04:56,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 11:04:56,082 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-13 11:04:56,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 11:04:56,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:56,083 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:56,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 11:04:56,083 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:56,083 INFO L82 PathProgramCache]: Analyzing trace with hash 597443447, now seen corresponding path program 37 times [2020-10-13 11:04:56,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:56,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828363045] [2020-10-13 11:04:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:56,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:57,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:57,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 11:04:57,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:57,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1535 [2020-10-13 11:04:57,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:57,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 11:04:57,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:04:57,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 11:04:57,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:58,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:04:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:58,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:04:58,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:04:58,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:04:58,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:04:58,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:04:58,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:04:58,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:04:58,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:04:58,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:04:58,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:04:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:04:58,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828363045] [2020-10-13 11:04:58,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:04:58,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 11:04:58,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372246044] [2020-10-13 11:04:58,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 11:04:58,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:04:58,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 11:04:58,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:04:58,712 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 40 states. [2020-10-13 11:04:59,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:04:59,671 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2020-10-13 11:04:59,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 11:04:59,672 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2020-10-13 11:04:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:04:59,673 INFO L225 Difference]: With dead ends: 112 [2020-10-13 11:04:59,673 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 11:04:59,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:04:59,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 11:04:59,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-13 11:04:59,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 11:04:59,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-13 11:04:59,679 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 49 [2020-10-13 11:04:59,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:04:59,679 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-13 11:04:59,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 11:04:59,679 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-13 11:04:59,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 11:04:59,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:04:59,680 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:04:59,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 11:04:59,680 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:04:59,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:04:59,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1367180234, now seen corresponding path program 38 times [2020-10-13 11:04:59,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:04:59,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360997976] [2020-10-13 11:04:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:04:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:04:59,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:00,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:00,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 11:05:00,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:00,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1060 [2020-10-13 11:05:00,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:00,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 11:05:00,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:05:00,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 11:05:00,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:01,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:01,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:01,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:01,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:01,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:01,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:05:01,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:01,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:01,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:01,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:01,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:05:01,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360997976] [2020-10-13 11:05:01,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:05:01,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 11:05:01,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129877567] [2020-10-13 11:05:01,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 11:05:01,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:01,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 11:05:01,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 11:05:01,893 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 41 states. [2020-10-13 11:05:02,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:02,938 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2020-10-13 11:05:02,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 11:05:02,941 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 50 [2020-10-13 11:05:02,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:02,942 INFO L225 Difference]: With dead ends: 114 [2020-10-13 11:05:02,942 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 11:05:02,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 11:05:02,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 11:05:02,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-13 11:05:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 11:05:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-13 11:05:02,954 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 50 [2020-10-13 11:05:02,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:02,955 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-13 11:05:02,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 11:05:02,955 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-13 11:05:02,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 11:05:02,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:02,956 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:02,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 11:05:02,956 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:02,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:02,957 INFO L82 PathProgramCache]: Analyzing trace with hash -540783145, now seen corresponding path program 39 times [2020-10-13 11:05:02,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:02,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041331386] [2020-10-13 11:05:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:02,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:04,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:04,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:05:04,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:04,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1400 [2020-10-13 11:05:04,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 11:05:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:05:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 11:05:04,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:05,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:05,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:05,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:05,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:05,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:05,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:05:05,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:05,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:05,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:05,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:05,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:05:05,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041331386] [2020-10-13 11:05:05,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:05:05,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 11:05:05,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713843397] [2020-10-13 11:05:05,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 11:05:05,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:05,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 11:05:05,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 11:05:05,553 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 42 states. [2020-10-13 11:05:06,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:06,635 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2020-10-13 11:05:06,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 11:05:06,639 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 51 [2020-10-13 11:05:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:06,640 INFO L225 Difference]: With dead ends: 116 [2020-10-13 11:05:06,641 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 11:05:06,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 11:05:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 11:05:06,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-13 11:05:06,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 11:05:06,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-13 11:05:06,650 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 51 [2020-10-13 11:05:06,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:06,651 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-13 11:05:06,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 11:05:06,651 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-13 11:05:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 11:05:06,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:06,652 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:06,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 11:05:06,652 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:06,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:06,652 INFO L82 PathProgramCache]: Analyzing trace with hash 441894250, now seen corresponding path program 40 times [2020-10-13 11:05:06,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:06,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560269982] [2020-10-13 11:05:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:06,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:07,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:08,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:08,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 11:05:08,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:05:08,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1440 [2020-10-13 11:05:08,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:08,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 11:05:08,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:05:08,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 11:05:08,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:09,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:09,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:09,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:09,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:09,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:09,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:05:09,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:09,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:09,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:09,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:09,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:05:09,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560269982] [2020-10-13 11:05:09,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:05:09,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 11:05:09,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895917558] [2020-10-13 11:05:09,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 11:05:09,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:09,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 11:05:09,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 11:05:09,353 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 43 states. [2020-10-13 11:05:10,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:10,493 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2020-10-13 11:05:10,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 11:05:10,494 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 52 [2020-10-13 11:05:10,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:10,494 INFO L225 Difference]: With dead ends: 118 [2020-10-13 11:05:10,494 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 11:05:10,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 11:05:10,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 11:05:10,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-13 11:05:10,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 11:05:10,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-13 11:05:10,500 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 52 [2020-10-13 11:05:10,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:10,500 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-13 11:05:10,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 11:05:10,500 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-13 11:05:10,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 11:05:10,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:10,501 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:10,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 11:05:10,501 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:10,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:10,501 INFO L82 PathProgramCache]: Analyzing trace with hash 840122423, now seen corresponding path program 41 times [2020-10-13 11:05:10,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:10,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967214441] [2020-10-13 11:05:10,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:10,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:11,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:11,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 11:05:11,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:11,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1260 [2020-10-13 11:05:11,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:11,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 11:05:11,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:05:11,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 11:05:11,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:13,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:13,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:13,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:13,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:13,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:13,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:05:13,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:13,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:13,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:13,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:05:13,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967214441] [2020-10-13 11:05:13,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:05:13,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 11:05:13,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085452532] [2020-10-13 11:05:13,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 11:05:13,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:13,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 11:05:13,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 11:05:13,069 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 44 states. [2020-10-13 11:05:14,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:14,275 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2020-10-13 11:05:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 11:05:14,275 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 53 [2020-10-13 11:05:14,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:14,276 INFO L225 Difference]: With dead ends: 120 [2020-10-13 11:05:14,276 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 11:05:14,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 11:05:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 11:05:14,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-13 11:05:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 11:05:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-13 11:05:14,283 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 53 [2020-10-13 11:05:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:14,283 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-13 11:05:14,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 11:05:14,283 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-13 11:05:14,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 11:05:14,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:14,284 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:14,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 11:05:14,284 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:14,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:14,285 INFO L82 PathProgramCache]: Analyzing trace with hash 300293898, now seen corresponding path program 42 times [2020-10-13 11:05:14,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:14,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864831776] [2020-10-13 11:05:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:14,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:16,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:16,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 11:05:16,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:16,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1733 [2020-10-13 11:05:16,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:16,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 11:05:16,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:05:16,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 11:05:16,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:17,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:17,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:17,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:17,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:17,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:17,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:05:17,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:17,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:17,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:17,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:17,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:05:17,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864831776] [2020-10-13 11:05:17,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:05:17,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 11:05:17,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043777657] [2020-10-13 11:05:17,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 11:05:17,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:17,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 11:05:17,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 11:05:17,402 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 45 states. [2020-10-13 11:05:18,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:18,683 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2020-10-13 11:05:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 11:05:18,684 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 54 [2020-10-13 11:05:18,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:18,685 INFO L225 Difference]: With dead ends: 122 [2020-10-13 11:05:18,685 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 11:05:18,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 11:05:18,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 11:05:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-13 11:05:18,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 11:05:18,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-13 11:05:18,692 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 54 [2020-10-13 11:05:18,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:18,692 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-13 11:05:18,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 11:05:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-13 11:05:18,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 11:05:18,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:18,693 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:18,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 11:05:18,693 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:18,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:18,694 INFO L82 PathProgramCache]: Analyzing trace with hash 745478807, now seen corresponding path program 43 times [2020-10-13 11:05:18,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:18,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766954166] [2020-10-13 11:05:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:18,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:20,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:20,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 11:05:20,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:20,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1688 [2020-10-13 11:05:20,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:20,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 11:05:20,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:05:20,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 11:05:20,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:21,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:21,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:21,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:21,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:21,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:21,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:05:21,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:21,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:21,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:21,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:21,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:05:21,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766954166] [2020-10-13 11:05:21,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:05:21,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 11:05:21,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759487794] [2020-10-13 11:05:21,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 11:05:21,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:21,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 11:05:21,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 11:05:21,794 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 46 states. [2020-10-13 11:05:23,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:23,144 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2020-10-13 11:05:23,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 11:05:23,145 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 55 [2020-10-13 11:05:23,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:23,146 INFO L225 Difference]: With dead ends: 124 [2020-10-13 11:05:23,146 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 11:05:23,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 11:05:23,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 11:05:23,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-13 11:05:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 11:05:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-13 11:05:23,153 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 55 [2020-10-13 11:05:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:23,153 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-13 11:05:23,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 11:05:23,154 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-13 11:05:23,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 11:05:23,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:23,154 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:23,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 11:05:23,155 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:23,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:23,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1661309098, now seen corresponding path program 44 times [2020-10-13 11:05:23,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:23,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610360140] [2020-10-13 11:05:23,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:23,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:25,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:26,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:26,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 11:05:26,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:05:26,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3760 [2020-10-13 11:05:26,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:26,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 11:05:26,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:05:26,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 11:05:26,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:28,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:28,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:28,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:28,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:28,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:28,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:05:28,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:28,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:28,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:28,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:28,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:05:28,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610360140] [2020-10-13 11:05:28,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:05:28,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 11:05:28,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605510087] [2020-10-13 11:05:28,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 11:05:28,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:28,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 11:05:28,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 11:05:28,409 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 47 states. [2020-10-13 11:05:29,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:29,789 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2020-10-13 11:05:29,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 11:05:29,791 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 56 [2020-10-13 11:05:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:29,791 INFO L225 Difference]: With dead ends: 126 [2020-10-13 11:05:29,792 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 11:05:29,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 11:05:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 11:05:29,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-13 11:05:29,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 11:05:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-13 11:05:29,800 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 56 [2020-10-13 11:05:29,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:29,800 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-13 11:05:29,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 11:05:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-13 11:05:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 11:05:29,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:29,806 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:29,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 11:05:29,806 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:29,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:29,807 INFO L82 PathProgramCache]: Analyzing trace with hash -12722953, now seen corresponding path program 45 times [2020-10-13 11:05:29,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:29,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447444543] [2020-10-13 11:05:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:29,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:32,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:32,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 11:05:32,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:32,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2196 [2020-10-13 11:05:32,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:32,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 11:05:32,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:05:32,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 11:05:32,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:33,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:33,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:33,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:33,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:33,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:33,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:05:33,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:33,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:33,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:33,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:33,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:05:33,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447444543] [2020-10-13 11:05:33,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:05:33,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 11:05:33,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230659238] [2020-10-13 11:05:33,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 11:05:33,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:33,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 11:05:33,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 11:05:33,565 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 48 states. [2020-10-13 11:05:35,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:35,029 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2020-10-13 11:05:35,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 11:05:35,030 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 57 [2020-10-13 11:05:35,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:35,031 INFO L225 Difference]: With dead ends: 128 [2020-10-13 11:05:35,031 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 11:05:35,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 11:05:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 11:05:35,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-13 11:05:35,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 11:05:35,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-13 11:05:35,040 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 57 [2020-10-13 11:05:35,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:35,040 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-13 11:05:35,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 11:05:35,040 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-13 11:05:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 11:05:35,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:35,041 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:35,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 11:05:35,041 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:35,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:35,042 INFO L82 PathProgramCache]: Analyzing trace with hash -368108982, now seen corresponding path program 46 times [2020-10-13 11:05:35,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:35,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154522492] [2020-10-13 11:05:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:35,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:37,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:37,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 11:05:37,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:37,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2177 [2020-10-13 11:05:37,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:37,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 11:05:37,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:05:37,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 11:05:37,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:38,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:38,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:38,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:38,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:38,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:38,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:05:38,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:38,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:38,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:38,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:38,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:05:38,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154522492] [2020-10-13 11:05:38,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:05:38,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 11:05:38,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780230966] [2020-10-13 11:05:38,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 11:05:38,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:38,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 11:05:38,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 11:05:38,851 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 49 states. [2020-10-13 11:05:40,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:40,366 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2020-10-13 11:05:40,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 11:05:40,368 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 58 [2020-10-13 11:05:40,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:40,369 INFO L225 Difference]: With dead ends: 130 [2020-10-13 11:05:40,369 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 11:05:40,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 11:05:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 11:05:40,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-13 11:05:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 11:05:40,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-13 11:05:40,376 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 58 [2020-10-13 11:05:40,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:40,377 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-13 11:05:40,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 11:05:40,377 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-13 11:05:40,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 11:05:40,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:40,378 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:40,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 11:05:40,378 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:40,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:40,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1499826007, now seen corresponding path program 47 times [2020-10-13 11:05:40,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:40,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874195945] [2020-10-13 11:05:40,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:40,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:42,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:42,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 11:05:42,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:42,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2105 [2020-10-13 11:05:42,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:42,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-13 11:05:42,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:05:42,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 11:05:42,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:44,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:44,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:44,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:44,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:44,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:44,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:05:44,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:44,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:44,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:44,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:44,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:05:44,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874195945] [2020-10-13 11:05:44,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:05:44,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 11:05:44,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135793154] [2020-10-13 11:05:44,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 11:05:44,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:44,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 11:05:44,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 11:05:44,191 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 50 states. [2020-10-13 11:05:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:45,814 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2020-10-13 11:05:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 11:05:45,815 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 59 [2020-10-13 11:05:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:45,816 INFO L225 Difference]: With dead ends: 132 [2020-10-13 11:05:45,816 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 11:05:45,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 11:05:45,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 11:05:45,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-13 11:05:45,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 11:05:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-10-13 11:05:45,824 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 59 [2020-10-13 11:05:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:45,824 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-10-13 11:05:45,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 11:05:45,824 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-10-13 11:05:45,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 11:05:45,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:45,825 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:45,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 11:05:45,825 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:45,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:45,825 INFO L82 PathProgramCache]: Analyzing trace with hash -723731478, now seen corresponding path program 48 times [2020-10-13 11:05:45,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:45,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109591676] [2020-10-13 11:05:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:45,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:46,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:50,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:50,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 11:05:50,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:05:50,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4679 [2020-10-13 11:05:50,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:50,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 11:05:50,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:05:50,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 11:05:50,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:52,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:52,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:52,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:52,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:52,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:52,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:05:52,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:52,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:52,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:52,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:52,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:05:52,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109591676] [2020-10-13 11:05:52,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:05:52,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-13 11:05:52,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129606434] [2020-10-13 11:05:52,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-13 11:05:52,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:52,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-13 11:05:52,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 11:05:52,265 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 51 states. [2020-10-13 11:05:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:05:53,962 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2020-10-13 11:05:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 11:05:53,963 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 60 [2020-10-13 11:05:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:05:53,964 INFO L225 Difference]: With dead ends: 134 [2020-10-13 11:05:53,964 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 11:05:53,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 11:05:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 11:05:53,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-13 11:05:53,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 11:05:53,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-13 11:05:53,971 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 60 [2020-10-13 11:05:53,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:05:53,971 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-13 11:05:53,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-13 11:05:53,971 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-13 11:05:53,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 11:05:53,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:05:53,972 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:05:53,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 11:05:53,972 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:05:53,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:05:53,972 INFO L82 PathProgramCache]: Analyzing trace with hash -934536777, now seen corresponding path program 49 times [2020-10-13 11:05:53,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:05:53,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255734389] [2020-10-13 11:05:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:05:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:53,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:57,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:57,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 11:05:57,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:57,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3157 [2020-10-13 11:05:57,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:57,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 11:05:57,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:05:57,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 11:05:57,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:58,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:05:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:05:58,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:05:58,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:05:58,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:05:58,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:05:58,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:05:58,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:05:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:05:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:05:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:05:58,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:05:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:05:58,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255734389] [2020-10-13 11:05:58,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:05:58,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-13 11:05:58,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816475551] [2020-10-13 11:05:58,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-13 11:05:58,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:05:58,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-13 11:05:58,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 11:05:58,946 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 52 states. [2020-10-13 11:06:00,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:00,689 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2020-10-13 11:06:00,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 11:06:00,693 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 61 [2020-10-13 11:06:00,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:00,694 INFO L225 Difference]: With dead ends: 136 [2020-10-13 11:06:00,694 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 11:06:00,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 11:06:00,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 11:06:00,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-13 11:06:00,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 11:06:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-13 11:06:00,700 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 61 [2020-10-13 11:06:00,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:00,700 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-13 11:06:00,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-13 11:06:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-13 11:06:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 11:06:00,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:00,701 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:00,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 11:06:00,701 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:00,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1120433546, now seen corresponding path program 50 times [2020-10-13 11:06:00,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:00,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222706670] [2020-10-13 11:06:00,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:00,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:03,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:03,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 11:06:03,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:03,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2580 [2020-10-13 11:06:03,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:03,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 11:06:03,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:06:03,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 11:06:03,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:05,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:05,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:05,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:05,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:05,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:05,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:06:05,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:05,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:05,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:05,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:05,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:06:05,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222706670] [2020-10-13 11:06:05,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:05,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 11:06:05,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756354314] [2020-10-13 11:06:05,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 11:06:05,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:05,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 11:06:05,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 11:06:05,199 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 53 states. [2020-10-13 11:06:07,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:07,045 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2020-10-13 11:06:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 11:06:07,046 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 62 [2020-10-13 11:06:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:07,046 INFO L225 Difference]: With dead ends: 138 [2020-10-13 11:06:07,046 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 11:06:07,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 11:06:07,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 11:06:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-13 11:06:07,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 11:06:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-13 11:06:07,052 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 62 [2020-10-13 11:06:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:07,053 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-13 11:06:07,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 11:06:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-13 11:06:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 11:06:07,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:07,054 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:07,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 11:06:07,054 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:07,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:07,054 INFO L82 PathProgramCache]: Analyzing trace with hash 400004119, now seen corresponding path program 51 times [2020-10-13 11:06:07,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:07,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230445930] [2020-10-13 11:06:07,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:07,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:09,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:09,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 11:06:09,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:09,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2561 [2020-10-13 11:06:09,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:09,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-13 11:06:09,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:06:09,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 11:06:09,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:11,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:11,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:11,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:11,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:11,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:11,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:06:11,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:11,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:11,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:11,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:11,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:11,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:06:11,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230445930] [2020-10-13 11:06:11,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:11,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-13 11:06:11,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519979838] [2020-10-13 11:06:11,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-13 11:06:11,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:11,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-13 11:06:11,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 11:06:11,589 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 54 states. [2020-10-13 11:06:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:13,469 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2020-10-13 11:06:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 11:06:13,470 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 63 [2020-10-13 11:06:13,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:13,471 INFO L225 Difference]: With dead ends: 140 [2020-10-13 11:06:13,471 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 11:06:13,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-13 11:06:13,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 11:06:13,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-13 11:06:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 11:06:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-13 11:06:13,479 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 63 [2020-10-13 11:06:13,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:13,479 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-13 11:06:13,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-13 11:06:13,479 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-13 11:06:13,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 11:06:13,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:13,482 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:13,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 11:06:13,482 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:13,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:13,482 INFO L82 PathProgramCache]: Analyzing trace with hash -458471638, now seen corresponding path program 52 times [2020-10-13 11:06:13,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:13,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83774205] [2020-10-13 11:06:13,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:13,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:16,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:16,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:16,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 11:06:16,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:06:16,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3376 [2020-10-13 11:06:16,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:16,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-13 11:06:16,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:06:16,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 11:06:16,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:18,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:18,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:18,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:18,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:18,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:18,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:06:18,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:18,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:18,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:18,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:18,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:06:18,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83774205] [2020-10-13 11:06:18,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:18,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-13 11:06:18,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860544576] [2020-10-13 11:06:18,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-13 11:06:18,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:18,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-13 11:06:18,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 11:06:18,935 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 55 states. [2020-10-13 11:06:20,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:20,848 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2020-10-13 11:06:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 11:06:20,848 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 64 [2020-10-13 11:06:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:20,849 INFO L225 Difference]: With dead ends: 142 [2020-10-13 11:06:20,849 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 11:06:20,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 11:06:20,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 11:06:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-13 11:06:20,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 11:06:20,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-13 11:06:20,855 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 64 [2020-10-13 11:06:20,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:20,856 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-13 11:06:20,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-13 11:06:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-13 11:06:20,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 11:06:20,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:20,856 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:20,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 11:06:20,857 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:20,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:20,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1301416329, now seen corresponding path program 53 times [2020-10-13 11:06:20,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:20,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785807519] [2020-10-13 11:06:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:20,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:23,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:23,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 11:06:23,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:23,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2563 [2020-10-13 11:06:23,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:23,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-13 11:06:23,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:06:23,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 11:06:23,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:25,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:25,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:25,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:25,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:25,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:25,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:06:25,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:25,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:25,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:25,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:25,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:06:25,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785807519] [2020-10-13 11:06:25,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:25,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-13 11:06:25,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759592802] [2020-10-13 11:06:25,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-13 11:06:25,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:25,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-13 11:06:25,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 11:06:25,553 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 56 states. [2020-10-13 11:06:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:27,555 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2020-10-13 11:06:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 11:06:27,555 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 65 [2020-10-13 11:06:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:27,556 INFO L225 Difference]: With dead ends: 144 [2020-10-13 11:06:27,556 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 11:06:27,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 11:06:27,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 11:06:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-13 11:06:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 11:06:27,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-13 11:06:27,562 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 65 [2020-10-13 11:06:27,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:27,563 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-13 11:06:27,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-13 11:06:27,563 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-13 11:06:27,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 11:06:27,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:27,564 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:27,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 11:06:27,564 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:27,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1662897974, now seen corresponding path program 54 times [2020-10-13 11:06:27,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:27,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426893348] [2020-10-13 11:06:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:27,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:31,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:31,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 11:06:31,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:31,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4002 [2020-10-13 11:06:31,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:31,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-13 11:06:31,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:06:31,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 11:06:31,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:33,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:33,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:33,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:33,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:33,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:33,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:06:33,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:33,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:33,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:33,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:33,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:06:33,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426893348] [2020-10-13 11:06:33,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:33,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-13 11:06:33,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766057509] [2020-10-13 11:06:33,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-13 11:06:33,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:33,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-13 11:06:33,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 11:06:33,811 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 57 states. [2020-10-13 11:06:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:35,890 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2020-10-13 11:06:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-13 11:06:35,896 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 66 [2020-10-13 11:06:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:35,897 INFO L225 Difference]: With dead ends: 146 [2020-10-13 11:06:35,897 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 11:06:35,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 11:06:35,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 11:06:35,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-13 11:06:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 11:06:35,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-10-13 11:06:35,904 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 66 [2020-10-13 11:06:35,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:35,905 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-10-13 11:06:35,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-13 11:06:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-10-13 11:06:35,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 11:06:35,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:35,906 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:35,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 11:06:35,906 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:35,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:35,906 INFO L82 PathProgramCache]: Analyzing trace with hash 16072919, now seen corresponding path program 55 times [2020-10-13 11:06:35,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:35,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153800302] [2020-10-13 11:06:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:35,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:40,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:40,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 11:06:40,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:40,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4991 [2020-10-13 11:06:40,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:40,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-13 11:06:40,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:06:40,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 11:06:40,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:43,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:43,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:43,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:43,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:43,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:43,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:43,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:43,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:43,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:43,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:43,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:06:43,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153800302] [2020-10-13 11:06:43,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:43,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 11:06:43,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827575283] [2020-10-13 11:06:43,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 11:06:43,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:43,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 11:06:43,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 11:06:43,247 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 58 states. [2020-10-13 11:06:45,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:45,431 INFO L93 Difference]: Finished difference Result 148 states and 157 transitions. [2020-10-13 11:06:45,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 11:06:45,437 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 67 [2020-10-13 11:06:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:45,438 INFO L225 Difference]: With dead ends: 148 [2020-10-13 11:06:45,438 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 11:06:45,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 11:06:45,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 11:06:45,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-13 11:06:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 11:06:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-13 11:06:45,446 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 67 [2020-10-13 11:06:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:45,447 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-13 11:06:45,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 11:06:45,447 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-13 11:06:45,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 11:06:45,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:45,448 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:45,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 11:06:45,449 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:45,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:45,449 INFO L82 PathProgramCache]: Analyzing trace with hash 524563050, now seen corresponding path program 56 times [2020-10-13 11:06:45,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:45,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168941232] [2020-10-13 11:06:45,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:45,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:48,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:50,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:50,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 11:06:50,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:06:50,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 11:06:50,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:50,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-13 11:06:50,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:06:50,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 11:06:50,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:52,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:06:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:52,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:52,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:52,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:06:52,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:52,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:06:52,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:52,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:06:52,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:06:52,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:06:52,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:06:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:06:52,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168941232] [2020-10-13 11:06:52,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:06:52,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-13 11:06:52,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92769557] [2020-10-13 11:06:52,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-13 11:06:52,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:06:52,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-13 11:06:52,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 11:06:52,868 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 59 states. [2020-10-13 11:06:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:06:55,099 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2020-10-13 11:06:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-13 11:06:55,100 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 68 [2020-10-13 11:06:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:06:55,101 INFO L225 Difference]: With dead ends: 150 [2020-10-13 11:06:55,101 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 11:06:55,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 11:06:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 11:06:55,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-13 11:06:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 11:06:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-13 11:06:55,109 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 68 [2020-10-13 11:06:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:06:55,109 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-13 11:06:55,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-13 11:06:55,110 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-13 11:06:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 11:06:55,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:06:55,110 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:06:55,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-13 11:06:55,111 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:06:55,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:06:55,111 INFO L82 PathProgramCache]: Analyzing trace with hash -892112073, now seen corresponding path program 57 times [2020-10-13 11:06:55,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:06:55,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140884269] [2020-10-13 11:06:55,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:06:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:06:55,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:06:59,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:06:59,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 11:06:59,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:06:59,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4269 [2020-10-13 11:06:59,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:06:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-13 11:06:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:06:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 11:06:59,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:01,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:01,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:01,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:01,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:01,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:01,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:01,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:01,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:01,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:01,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:01,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:01,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140884269] [2020-10-13 11:07:01,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:01,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-13 11:07:01,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760515450] [2020-10-13 11:07:01,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-13 11:07:01,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:01,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-13 11:07:01,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 11:07:01,879 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 60 states. [2020-10-13 11:07:04,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:04,166 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2020-10-13 11:07:04,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-13 11:07:04,167 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 69 [2020-10-13 11:07:04,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:04,168 INFO L225 Difference]: With dead ends: 152 [2020-10-13 11:07:04,168 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 11:07:04,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 11:07:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 11:07:04,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-13 11:07:04,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 11:07:04,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-10-13 11:07:04,176 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 69 [2020-10-13 11:07:04,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:04,176 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-10-13 11:07:04,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-13 11:07:04,176 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-10-13 11:07:04,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 11:07:04,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:04,177 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:04,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-13 11:07:04,178 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:04,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:04,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1859367926, now seen corresponding path program 58 times [2020-10-13 11:07:04,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:04,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476134768] [2020-10-13 11:07:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:04,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:09,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:09,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 11:07:09,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:09,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 11:07:09,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:09,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-13 11:07:09,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:07:09,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 11:07:09,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:11,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:11,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:11,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:11,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:11,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:11,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:11,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:11,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:11,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:11,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:11,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:11,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476134768] [2020-10-13 11:07:11,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:11,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-13 11:07:11,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547381556] [2020-10-13 11:07:11,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-13 11:07:11,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:11,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-13 11:07:11,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 11:07:11,733 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 61 states. [2020-10-13 11:07:13,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:13,931 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2020-10-13 11:07:13,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 11:07:13,936 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 70 [2020-10-13 11:07:13,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:13,937 INFO L225 Difference]: With dead ends: 154 [2020-10-13 11:07:13,937 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 11:07:13,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 11:07:13,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 11:07:13,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-13 11:07:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 11:07:13,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-10-13 11:07:13,946 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 70 [2020-10-13 11:07:13,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:13,946 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-10-13 11:07:13,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-13 11:07:13,947 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-10-13 11:07:13,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 11:07:13,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:13,947 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:13,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-13 11:07:13,948 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:13,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:13,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1779528297, now seen corresponding path program 59 times [2020-10-13 11:07:13,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:13,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121941449] [2020-10-13 11:07:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:13,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:18,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:18,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 11:07:18,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:18,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4693 [2020-10-13 11:07:18,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:18,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-13 11:07:18,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:07:18,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 11:07:18,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:21,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:21,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:21,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:21,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:21,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:21,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:21,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:21,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:21,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:21,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:21,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:21,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121941449] [2020-10-13 11:07:21,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:21,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-13 11:07:21,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964378590] [2020-10-13 11:07:21,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-13 11:07:21,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:21,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-13 11:07:21,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3602, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 11:07:21,273 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 62 states. [2020-10-13 11:07:23,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:23,609 INFO L93 Difference]: Finished difference Result 156 states and 165 transitions. [2020-10-13 11:07:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-13 11:07:23,609 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 71 [2020-10-13 11:07:23,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:23,610 INFO L225 Difference]: With dead ends: 156 [2020-10-13 11:07:23,610 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 11:07:23,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=180, Invalid=3602, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 11:07:23,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 11:07:23,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-13 11:07:23,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 11:07:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-13 11:07:23,618 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 71 [2020-10-13 11:07:23,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:23,618 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-13 11:07:23,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-13 11:07:23,619 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-13 11:07:23,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 11:07:23,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:23,619 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:23,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-13 11:07:23,620 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:23,620 INFO L82 PathProgramCache]: Analyzing trace with hash 695500202, now seen corresponding path program 60 times [2020-10-13 11:07:23,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:23,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133182024] [2020-10-13 11:07:23,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:23,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:27,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:28,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:28,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 11:07:28,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:07:28,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:07:28,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:28,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-13 11:07:28,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:07:28,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 11:07:28,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:31,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:31,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:31,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:31,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:31,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:31,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:31,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:31,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:31,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:31,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:31,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:31,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133182024] [2020-10-13 11:07:31,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:31,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-13 11:07:31,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898677861] [2020-10-13 11:07:31,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-13 11:07:31,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:31,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-13 11:07:31,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 11:07:31,332 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 63 states. [2020-10-13 11:07:33,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:33,735 INFO L93 Difference]: Finished difference Result 158 states and 167 transitions. [2020-10-13 11:07:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-13 11:07:33,742 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 72 [2020-10-13 11:07:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:33,743 INFO L225 Difference]: With dead ends: 158 [2020-10-13 11:07:33,743 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 11:07:33,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 11:07:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 11:07:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-13 11:07:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 11:07:33,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-13 11:07:33,752 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 72 [2020-10-13 11:07:33,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:33,752 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-13 11:07:33,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-13 11:07:33,752 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-13 11:07:33,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 11:07:33,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:33,753 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:33,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-13 11:07:33,754 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:33,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:33,754 INFO L82 PathProgramCache]: Analyzing trace with hash 111972343, now seen corresponding path program 61 times [2020-10-13 11:07:33,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:33,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091507961] [2020-10-13 11:07:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:33,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:38,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:38,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 11:07:38,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:38,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4314 [2020-10-13 11:07:38,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:38,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-13 11:07:38,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:07:38,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 11:07:38,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:40,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:40,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:40,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:40,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:07:40,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:40,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:40,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:40,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:40,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:40,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:40,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:40,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091507961] [2020-10-13 11:07:40,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:40,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-13 11:07:40,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549182445] [2020-10-13 11:07:40,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-13 11:07:40,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:40,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-13 11:07:40,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 11:07:40,834 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 64 states. [2020-10-13 11:07:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:43,356 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2020-10-13 11:07:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-13 11:07:43,359 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 73 [2020-10-13 11:07:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:43,360 INFO L225 Difference]: With dead ends: 160 [2020-10-13 11:07:43,361 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 11:07:43,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 11:07:43,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 11:07:43,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-13 11:07:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 11:07:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-10-13 11:07:43,368 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 73 [2020-10-13 11:07:43,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:43,369 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-10-13 11:07:43,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-13 11:07:43,369 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-10-13 11:07:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 11:07:43,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:43,370 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:43,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-13 11:07:43,370 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:43,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:43,370 INFO L82 PathProgramCache]: Analyzing trace with hash -797522102, now seen corresponding path program 62 times [2020-10-13 11:07:43,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:43,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321969532] [2020-10-13 11:07:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:43,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:48,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:48,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 11:07:48,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:48,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-13 11:07:48,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:48,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-13 11:07:48,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:07:48,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 11:07:48,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0